A luxury vehicle is a relatively expensive vehicle that includes additional features designed to increase the comfort of the driver and passengers. Luxury vehicles usually place more emphasis on comfort, appearance, and amenities such as technological upgrades and higher quality materials than on performance, economy, or utility. Luxury vehicles are often built in smaller numbers than more affordable mass-market vehicles. Luxury vehicles are historically 5 or 6-passenger four-door sedans. Recently the term "luxury" has been stapled onto other vehicles, including coupés, hatchbacks, station wagons, roadsters, and even trucks, such as light pickup trucks or sport utility vehicles.